<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>

        * {
            padding: 0;
            margin: 0;
        }
        body {
            background-color: #000;
        }

        div {
            position: absolute;
            left: calc(50% - 350px);
            top: 100px;
            width: 700px;
            height: 100px;
            font-size: 80px;
            color: #ddd;
            text-shadow: 0px 0px 10px #0f0,
                         0px 0px 20px #0f0,
                         0px 0px 30px #0f0;
            /* 写多个会加强阴影效果 */

            transition: all 2s;
        }

        div:hover {
            text-shadow: 0px 0px 10px #f00,
                         0px 0px 20px #f10,
                         0px 0px 30px #f20;
        }
        div::before {
            content: "NO ";
            opacity: 0;
            transition: all 2s;
            text-shadow: 0px 0px 10px #f00,
                         0px 0px 20px #f10,
                         0px 0px 30px #f20,
                         0px -5px 20px #f10,
                         0px -10px 20px #f20,
                         0px -15px 30px #f10,
                         0px -20px 40px #f20;
        }
        div:hover::before {
            opacity: 1;
        }


    </style>
</head>
<body>
    <div>ACCESS</div>
</body>
</html>